xref: /xnu-8792.61.2/osfmk/arm/cpu_capabilities.h (revision 42e220869062b56f8d7d0726fd4c88954f87902c)
1 /*
2  * Copyright (c) 2007 Apple Inc. All rights reserved.
3  *
4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5  *
6  * This file contains Original Code and/or Modifications of Original Code
7  * as defined in and that are subject to the Apple Public Source License
8  * Version 2.0 (the 'License'). You may not use this file except in
9  * compliance with the License. The rights granted to you under the License
10  * may not be used to create, or enable the creation or redistribution of,
11  * unlawful or unlicensed copies of an Apple operating system, or to
12  * circumvent, violate, or enable the circumvention or violation of, any
13  * terms of an Apple operating system software license agreement.
14  *
15  * Please obtain a copy of the License at
16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
17  *
18  * The Original Code and all software distributed under the License are
19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23  * Please see the License for the specific language governing rights and
24  * limitations under the License.
25  *
26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27  */
28 #ifdef  PRIVATE
29 
30 #ifndef _ARM_CPU_CAPABILITIES_H
31 #define _ARM_CPU_CAPABILITIES_H
32 
33 #if defined (__arm__) || defined (__arm64__)
34 
35 #ifndef __ASSEMBLER__
36 #include <stdint.h>
37 #include <mach/vm_types.h>
38 #endif
39 
40 
41 #define USER_TIMEBASE_NONE   0
42 #define USER_TIMEBASE_SPEC   1
43 #define USER_TIMEBASE_NOSPEC 2
44 #define USER_TIMEBASE_NOSPEC_APPLE 3
45 
46 /*
47  * This is the authoritative way to determine from user mode what
48  * implementation-specific processor features are available.
49  * This API only supported for Apple internal use.
50  *
51  */
52 
53 /*
54  * Bit definitions for _cpu_capabilities:
55  */
56 #define kHasFeatFP16                    0x00000008      // ARM v8.2 NEON FP16 supported
57 #define kCache32                        0x00000010      // cache line size is 32 bytes
58 #define kCache64                        0x00000020      // cache line size is 64 bytes
59 #define kCache128                       0x00000040      // cache line size is 128 bytes
60 #define kFastThreadLocalStorage         0x00000080      // TLS ptr is kept in a user-mode-readable register
61 #define kHasAdvSIMD                     0x00000100      // Advanced SIMD is supported
62 #define kHasAdvSIMD_HPFPCvt             0x00000200      // Advanced SIMD half-precision
63 #define kHasVfp                         0x00000400      // VFP is supported
64 #define kHasUCNormalMemory              0x00000800      // Uncacheable normal memory type supported
65 #define kHasEvent                       0x00001000      // WFE/SVE and period event wakeup
66 #define kHasFMA                         0x00002000      // Fused multiply add is supported
67 #define kHasFeatFHM                     0x00004000      // Optional ARMv8.2 FMLAL/FMLSL instructions (required in ARMv8.4)
68 #define kUP                             0x00008000      // set if (kNumCPUs == 1)
69 #define kNumCPUs                        0x00FF0000      // number of CPUs (see _NumCPUs() below)
70 #define kHasARMv8Crypto                 0x01000000      // Optional ARMv8 Crypto extensions
71 #define kHasFeatLSE                     0x02000000      // ARMv8.1 Atomic instructions supported
72 #define kHasARMv8Crc32                  0x04000000      // Optional ARMv8 crc32 instructions (required in ARMv8.1)
73 #define kHasFeatSHA512                  0x80000000      // Optional ARMv8.2 SHA512 instructions
74 /* Extending into 64-bits from here: */
75 #define kHasFeatSHA3            0x0000000100000000      // Optional ARMv8.2 SHA3 instructions
76 #define kHasFeatFCMA            0x0000000200000000      // ARMv8.3 complex number instructions
77 #define kHasFEATFlagM           0x0000010000000000
78 #define kHasFEATFlagM2          0x0000020000000000
79 #define kHasFeatDotProd         0x0000040000000000
80 #define kHasFeatRDM             0x0000080000000000
81 #define kHasFeatSPECRES         0x0000100000000000
82 #define kHasFeatSB              0x0000200000000000
83 #define kHasFeatFRINTTS         0x0000400000000000
84 #define kHasArmv8GPI            0x0000800000000000
85 #define kHasFeatLRCPC           0x0001000000000000
86 #define kHasFeatLRCPC2          0x0002000000000000
87 #define kHasFeatJSCVT           0x0004000000000000
88 #define kHasFeatPAuth           0x0008000000000000
89 #define kHasFeatDPB             0x0010000000000000
90 #define kHasFeatDPB2            0x0020000000000000
91 #define kHasFeatLSE2            0x0040000000000000
92 #define kHasFeatCSV2            0x0080000000000000
93 #define kHasFeatCSV3            0x0100000000000000
94 #define kHasFeatDIT             0x0200000000000000
95 #define kHasFP_SyncExceptions   0x0400000000000000
96 
97 /* Individual features coalesced to save bits */
98 #define kHasFeatSHA256          kHasARMv8Crypto
99 #define kHasFeatSHA1            kHasARMv8Crypto
100 #define kHasFeatAES             kHasARMv8Crypto
101 #define kHasFeatPMULL           kHasARMv8Crypto
102 
103 /* Deprecated names */
104 #define kHasNeonFP16            kHasFeatFP16
105 #define kHasNeon                kHasAdvSIMD
106 #define kHasNeonHPFP            kHasAdvSIMD_HPFPCvt
107 #define kHasARMv82FHM           kHasFeatFHM
108 #define kHasARMv81Atomics       kHasFeatLSE
109 #define kHasARMv82SHA512        kHasFeatSHA512
110 #define kHasARMv82SHA3          kHasFeatSHA3
111 #define kHasARMv83CompNum       kHasFeatFCMA
112 
113 #define kNumCPUsShift                   16              // see _NumCPUs() below
114 /*
115  * Bit definitions for multiuser_config:
116  */
117 #define kIsMultiUserDevice      0x80000000      // this device is in multiuser mode
118 #define kHasSecondaryUsers      0x40000000      // this device has Secondary Users
119 #define kMultiUserCurrentUserMask       0x3fffffff      // the current user UID of the multiuser device
120 
121 #ifndef __ASSEMBLER__
122 #include <sys/commpage.h>
123 
124 __BEGIN_DECLS
125 extern uint64_t _get_cpu_capabilities( void );
126 __END_DECLS
127 
128 __inline static
129 int
_NumCPUs(void)130 _NumCPUs( void )
131 {
132 	return (_get_cpu_capabilities() & kNumCPUs) >> kNumCPUsShift;
133 }
134 
135 
136 typedef struct {
137 	volatile uint64_t       TimeBase;
138 	volatile uint32_t       TimeStamp_sec;
139 	volatile uint32_t       TimeStamp_usec;
140 	volatile uint32_t       TimeBaseTicks_per_sec;
141 	volatile uint32_t       TimeBaseTicks_per_usec;
142 	volatile uint64_t       TimeBase_magic;
143 	volatile uint32_t       TimeBase_add;
144 	volatile uint32_t       TimeBase_shift;
145 } commpage_timeofday_data_t;
146 
147 __BEGIN_DECLS
148 extern vm_address_t                             _get_commpage_priv_address(void);
149 extern vm_address_t                             _get_commpage_ro_address(void);
150 extern vm_address_t                             _get_commpage_text_priv_address(void);
151 __END_DECLS
152 
153 #endif /* __ASSEMBLER__ */
154 
155 
156 /*
157  * The shared kernel/user "comm page(s)":
158  */
159 
160 #if defined(__LP64__)
161 
162 #define _COMM_PAGE64_BASE_ADDRESS               (0x0000000FFFFFC000ULL) /* In TTBR0 */
163 #define _COMM_PAGE64_RO_ADDRESS                 (0x0000000FFFFF4000ULL) /* In TTBR0 */
164 #define _COMM_PAGE64_AREA_LENGTH                (_COMM_PAGE32_AREA_LENGTH)
165 #define _COMM_PAGE64_AREA_USED                  (-1)
166 
167 #define _COMM_PAGE_PRIV(_addr_)                 ((_addr_) - (_COMM_PAGE_START_ADDRESS) + _get_commpage_priv_address())
168 
169 #ifdef KERNEL_PRIVATE
170 #define _COMM_PAGE_RW_OFFSET                    (0)
171 #define _COMM_PAGE_RO_OFFSET                    (0)
172 #define _COMM_PAGE_AREA_LENGTH                  (PAGE_SIZE)
173 
174 #define _COMM_PAGE_BASE_ADDRESS                 (_get_commpage_priv_address())
175 #define _COMM_PAGE_START_ADDRESS                (_get_commpage_priv_address())
176 #define _COMM_PAGE_RO_ADDRESS                   (_get_commpage_ro_address())
177 
178 /**
179  * This represents the size of the memory region that the commpage is nested in.
180  * On 4K page systems, this is 1GB, and on 16KB page systems this is technically
181  * only 32MB, but to keep consistency across address spaces we always reserve
182  * 1GB for the commpage on ARM devices.
183  *
184  * The commpage itself only takes up a single page, but its page tables are
185  * being shared across every user process. Entries should not be allowed to
186  * be created in those shared tables, which is why the VM uses these values to
187  * reserve the entire nesting region in every user process address space.
188  *
189  * If the commpage base address changes, these values might also need to be
190  * updated.
191  */
192 #define _COMM_PAGE64_NESTING_START                (0x0000000FC0000000ULL)
193 #define _COMM_PAGE64_NESTING_SIZE                 (0x40000000ULL) /* 1GiB */
194 _Static_assert((_COMM_PAGE64_BASE_ADDRESS >= _COMM_PAGE64_NESTING_START) &&
195     (_COMM_PAGE64_BASE_ADDRESS < (_COMM_PAGE64_NESTING_START + _COMM_PAGE64_NESTING_SIZE)),
196     "_COMM_PAGE64_BASE_ADDRESS is not within the nesting region. Commpage nesting "
197     "region probably needs to be updated.");
198 
199 #else /* KERNEL_PRIVATE */
200 /*
201  * <sys/commpage.h> defines a couple of convenience macros
202  * to help read data from the commpage.
203  */
204 #define _COMM_PAGE_AREA_LENGTH                  (4096)
205 
206 #define _COMM_PAGE_BASE_ADDRESS                 _COMM_PAGE64_BASE_ADDRESS
207 #define _COMM_PAGE_START_ADDRESS                _COMM_PAGE64_BASE_ADDRESS
208 #define _COMM_PAGE_RO_ADDRESS                   _COMM_PAGE64_RO_ADDRESS
209 #endif /* KERNEL_PRIVATE */
210 
211 #else /* __LP64__ */
212 
213 #define _COMM_PAGE64_BASE_ADDRESS               (-1)
214 #define _COMM_PAGE64_AREA_LENGTH                (-1)
215 #define _COMM_PAGE64_AREA_USED                  (-1)
216 
217 // macro to change a user comm page address to one that is accessible from privileged mode
218 // this macro is stubbed as PAN is not available on AARCH32,
219 // but this may still be required for compatibility
220 #define _COMM_PAGE_PRIV(_addr_)                 (_addr_)
221 
222 #ifdef KERNEL_PRIVATE
223 #define _COMM_PAGE_RW_OFFSET                    (_get_commpage_priv_address()-_COMM_PAGE_BASE_ADDRESS)
224 #define _COMM_PAGE_RO_OFFSET                    (_get_commpage_ro_address()-_COMM_PAGE_RO_ADDRESS)
225 #define _COMM_PAGE_AREA_LENGTH                  (PAGE_SIZE)
226 #else /* KERNEL_PRIVATE */
227 #define _COMM_PAGE_AREA_LENGTH                  (4096)
228 #endif /* KERNEL_PRIVATE */
229 
230 #define _COMM_PAGE_BASE_ADDRESS                 _COMM_PAGE32_BASE_ADDRESS
231 #define _COMM_PAGE_START_ADDRESS                _COMM_PAGE32_BASE_ADDRESS
232 #define _COMM_PAGE_RO_ADDRESS                   _COMM_PAGE32_RO_ADDRESS
233 
234 #endif /* __LP64__ */
235 
236 #define _COMM_PAGE32_BASE_ADDRESS               (0xFFFF4000)            /* Must be outside of normal map bounds */
237 #define _COMM_PAGE32_RO_ADDRESS                 (0xFFFFC000)            /* Must be outside of normal map bounds */
238 #define _COMM_PAGE32_AREA_LENGTH                (_COMM_PAGE_AREA_LENGTH)
239 #define _COMM_PAGE32_TEXT_START                 (-1)
240 
241 #define _COMM_PAGE32_OBJC_SIZE                  0ULL
242 #define _COMM_PAGE32_OBJC_BASE                  0ULL
243 #define _COMM_PAGE64_OBJC_SIZE                  0ULL
244 #define _COMM_PAGE64_OBJC_BASE                  0ULL
245 
246 /*
247  * Comm page layout versions
248  *
249  * If you need to create an RO variant of an existing commpage field (see "Comm page data fields"
250  * description below), bump the maximum value of _COMM_PAGE_LAYOUT_VERSION.  The kernel should
251  * always use the latest version.  Individual build targets may default to lower versions as
252  * needed.  For layout versions lower than the version in which an RO variant was added, the
253  * field should be defined to use the "legacy" RW offset.  In general, we expect these comm page
254  * fields to only be used by platform-level binaries, which are typically coupled to the SDK.
255  * A notable exception are simulator targets, which must run the latest platform binaries against
256  * older host kernels.  Individual builds can also override _COMM_PAGE_LAYOUT_VERSION if they
257  * should need to for some reason.
258  * Note that we don't use the _COMM_PAGE_VERSION field to provide conditional runtime access
259  * to these RO fields, as the version resides in the legacy kernel-writable page and could be
260  * spoofed by an attacker.
261  */
262 
263 #ifndef _COMM_PAGE_LAYOUT_VERSION
264 
265 #if KERNEL
266 #define _COMM_PAGE_LAYOUT_VERSION 1
267 #elif TARGET_OS_SIMULATOR
268 // Simulators require running platform libraries built against new SDKs on older hosts
269 #define _COMM_PAGE_LAYOUT_VERSION 0
270 #else
271 #define _COMM_PAGE_LAYOUT_VERSION 1
272 #endif
273 
274 #endif // #ifndef _COMM_PAGE_LAYOUT_VERSION
275 
276 /*
277  * Comm page data fields
278  *
279  * There is always at least one comm page, backed by a physical page with a kernel RW mapping.
280  * Apply the _COMM_PAGE_PRIV macro to use this mapping in kernel mode.
281  * Depending on device configuration, there may be an additional comm page, backed by a physical
282  * page with a kernel RO mapping.  This is an additional security measure for certain high-value
283  * comm page fields which only need to be accessed from the kernel during early boot.
284  * Fields that wish to use this page when available should be defined here as an offset from
285  * _COMM_PAGE_RO_ADDRESS instead of _COMM_PAGE_START_ADDRESS, and should be placed at an offset
286  * that does not overlap with any other RO or RW field.  If an existing field is migrated from
287  * the RW to the RO page, the RW definition should be preserved with a _LEGACY suffix in order
288  * to maintain binary compatibility.
289  */
290 #define _COMM_PAGE_SIGNATURE                    (_COMM_PAGE_START_ADDRESS+0x000)        // first few bytes are a signature
291 #define _COMM_PAGE_SIGNATURELEN                 (0x10)
292 #define _COMM_PAGE_CPU_CAPABILITIES64           (_COMM_PAGE_START_ADDRESS+0x010)        /* uint64_t _cpu_capabilities */
293 #define _COMM_PAGE_UNUSED                       (_COMM_PAGE_START_ADDRESS+0x018)        /* 6 unused bytes */
294 #define _COMM_PAGE_VERSION                      (_COMM_PAGE_START_ADDRESS+0x01E)        // 16-bit version#
295 #define _COMM_PAGE_THIS_VERSION                 3                                       // version of the commarea format
296 
297 #define _COMM_PAGE_CPU_CAPABILITIES             (_COMM_PAGE_START_ADDRESS+0x020)        // uint32_t _cpu_capabilities
298 #define _COMM_PAGE_NCPUS                        (_COMM_PAGE_START_ADDRESS+0x022)        // uint8_t number of configured CPUs
299 
300 #define _COMM_PAGE_USER_PAGE_SHIFT_32_LEGACY    (_COMM_PAGE_START_ADDRESS+0x024)        // VM page shift for 32-bit processes
301 #if _COMM_PAGE_LAYOUT_VERSION >= 1
302 #define _COMM_PAGE_USER_PAGE_SHIFT_32           (_COMM_PAGE_RO_ADDRESS+0x024)           // VM page shift for 32-bit processes
303 #else
304 #define _COMM_PAGE_USER_PAGE_SHIFT_32            _COMM_PAGE_USER_PAGE_SHIFT_32_LEGACY
305 #endif
306 
307 #define _COMM_PAGE_USER_PAGE_SHIFT_64_LEGACY    (_COMM_PAGE_START_ADDRESS+0x025)        // VM page shift for 64-bit processes
308 #if _COMM_PAGE_LAYOUT_VERSION >= 1
309 #define _COMM_PAGE_USER_PAGE_SHIFT_64           (_COMM_PAGE_RO_ADDRESS+0x025)           // VM page shift for 64-bit processes
310 #else
311 #define _COMM_PAGE_USER_PAGE_SHIFT_64            _COMM_PAGE_USER_PAGE_SHIFT_64_LEGACY
312 #endif
313 
314 #define _COMM_PAGE_CACHE_LINESIZE               (_COMM_PAGE_START_ADDRESS+0x026)        // uint16_t cache line size
315 #define _COMM_PAGE_UNUSED4                      (_COMM_PAGE_START_ADDRESS+0x028)        // used to be _COMM_PAGE_SCHED_GEN: uint32_t scheduler generation number (count of pre-emptions)
316 #define _COMM_PAGE_UNUSED3                      (_COMM_PAGE_START_ADDRESS+0x02C)        // used to be _COMM_PAGE_SPIN_COUNT: uint32_t max spin count for mutex's
317 #define _COMM_PAGE_MEMORY_PRESSURE              (_COMM_PAGE_START_ADDRESS+0x030)        // uint32_t copy of vm_memory_pressure
318 #define _COMM_PAGE_ACTIVE_CPUS                  (_COMM_PAGE_START_ADDRESS+0x034)        // uint8_t number of active CPUs (hw.activecpu)
319 #define _COMM_PAGE_PHYSICAL_CPUS                (_COMM_PAGE_START_ADDRESS+0x035)        // uint8_t number of physical CPUs (hw.physicalcpu_max)
320 #define _COMM_PAGE_LOGICAL_CPUS                 (_COMM_PAGE_START_ADDRESS+0x036)        // uint8_t number of logical CPUs (hw.logicalcpu_max)
321 
322 #define _COMM_PAGE_KERNEL_PAGE_SHIFT_LEGACY     (_COMM_PAGE_START_ADDRESS+0x037)        // uint8_t kernel vm page shift */
323 #if _COMM_PAGE_LAYOUT_VERSION >= 1
324 #define _COMM_PAGE_KERNEL_PAGE_SHIFT            (_COMM_PAGE_RO_ADDRESS+0x037)           // uint8_t kernel vm page shift */
325 #else
326 #define _COMM_PAGE_KERNEL_PAGE_SHIFT            _COMM_PAGE_KERNEL_PAGE_SHIFT_LEGACY
327 #endif
328 
329 #define _COMM_PAGE_MEMORY_SIZE                  (_COMM_PAGE_START_ADDRESS+0x038)        // uint64_t max memory size */
330 #define _COMM_PAGE_TIMEOFDAY_DATA               (_COMM_PAGE_START_ADDRESS+0x040)        // used by gettimeofday(). Currently, sizeof(commpage_timeofday_data_t) = 40. A new struct is used on gettimeofday but space is reserved on the commpage for compatibility
331 #define _COMM_PAGE_CPUFAMILY                    (_COMM_PAGE_START_ADDRESS+0x080)        // used by memcpy() resolver
332 
333 #define _COMM_PAGE_DEV_FIRM_LEGACY              (_COMM_PAGE_START_ADDRESS+0x084)        // uint32_t handle on PE_i_can_has_debugger
334 #if _COMM_PAGE_LAYOUT_VERSION >= 1
335 #define _COMM_PAGE_DEV_FIRM                     (_COMM_PAGE_RO_ADDRESS+0x084)           // uint32_t handle on PE_i_can_has_debugger
336 #else
337 #define _COMM_PAGE_DEV_FIRM                     _COMM_PAGE_DEV_FIRM_LEGACY
338 #endif
339 
340 #define _COMM_PAGE_TIMEBASE_OFFSET              (_COMM_PAGE_START_ADDRESS+0x088)        // uint64_t timebase offset for constructing mach_absolute_time()
341 #define _COMM_PAGE_USER_TIMEBASE                (_COMM_PAGE_START_ADDRESS+0x090)        // uint8_t is userspace mach_absolute_time supported (can read the timebase)
342 #define _COMM_PAGE_CONT_HWCLOCK                 (_COMM_PAGE_START_ADDRESS+0x091)        // uint8_t is always-on hardware clock present for mach_continuous_time()
343 #define _COMM_PAGE_DTRACE_DOF_ENABLED           (_COMM_PAGE_START_ADDRESS+0x092)        // uint8_t 0 if userspace DOF disable, 1 if enabled
344 #define _COMM_PAGE_UNUSED0                      (_COMM_PAGE_START_ADDRESS+0x093)        // 5 unused bytes
345 #define _COMM_PAGE_CONT_TIMEBASE                (_COMM_PAGE_START_ADDRESS+0x098)        // uint64_t base for mach_continuous_time() relative to mach_absolute_time()
346 #define _COMM_PAGE_BOOTTIME_USEC                (_COMM_PAGE_START_ADDRESS+0x0A0)        // uint64_t boottime in microseconds
347 #define _COMM_PAGE_CONT_HW_TIMEBASE             (_COMM_PAGE_START_ADDRESS+0x0A8)        // uint64_t base for mach_continuous_time() relative to CNT[PV]CT
348 
349 // aligning to 64byte for cacheline size
350 #define _COMM_PAGE_APPROX_TIME                  (_COMM_PAGE_START_ADDRESS+0x0C0)        // uint64_t last known mach_absolute_time()
351 #define _COMM_PAGE_APPROX_TIME_SUPPORTED        (_COMM_PAGE_START_ADDRESS+0x0C8)        // uint8_t is mach_approximate_time supported
352 
353 
354 #define _COMM_PAGE_UNUSED1                      (_COMM_PAGE_START_ADDRESS+0x0D9)        // 39 unused bytes, align next mutable value to a separate cache line
355 
356 #define _COMM_PAGE_KDEBUG_ENABLE                (_COMM_PAGE_START_ADDRESS+0x100)        // uint32_t export kdebug status bits to userspace
357 #define _COMM_PAGE_ATM_DIAGNOSTIC_CONFIG        (_COMM_PAGE_START_ADDRESS+0x104)        // uint32_t export "atm_diagnostic_config" to userspace
358 #define _COMM_PAGE_MULTIUSER_CONFIG             (_COMM_PAGE_START_ADDRESS+0x108)        // uint32_t export "multiuser_config" to userspace
359 
360 
361 #define _COMM_PAGE_NEWTIMEOFDAY_DATA            (_COMM_PAGE_START_ADDRESS+0x120)        // used by gettimeofday(). Currently, sizeof(new_commpage_timeofday_data_t) = 40.
362 #define _COMM_PAGE_REMOTETIME_PARAMS            (_COMM_PAGE_START_ADDRESS+0x148)        // used by mach_bridge_remote_time(). Currently, sizeof(struct bt_params) = 24
363 #define _COMM_PAGE_DYLD_FLAGS                   (_COMM_PAGE_START_ADDRESS+0x160)        // uint64_t export kern.dyld_system_flags to userspace
364 
365 // aligning to 128 bytes for cacheline/fabric size
366 #define _COMM_PAGE_CPU_QUIESCENT_COUNTER        (_COMM_PAGE_START_ADDRESS+0x180)        // uint64_t, but reserve the whole 128 (0x80) bytes
367 
368 #define _COMM_PAGE_END                          (_COMM_PAGE_START_ADDRESS+0xfff)        // end of common page
369 
370 #if defined(__LP64__)
371 #if KERNEL_PRIVATE
372 #define _COMM_PAGE64_TEXT_START_ADDRESS          (_get_commpage_text_priv_address())      // Address through physical aperture
373 #endif
374 /* Offset in bytes from start of text comm page to get to these functions. Start
375  * address to text comm page is from apple array */
376 #define _COMM_PAGE_TEXT_ATOMIC_ENQUEUE                  (0x0)
377 #define _COMM_PAGE_TEXT_ATOMIC_DEQUEUE                  (0x4)
378 
379 #else /* __LP64__ */
380 /* No 32 bit text region */
381 #endif /* __LP64__ */
382 
383 #endif /* defined (__arm__) || defined (__arm64__) */
384 #endif /* _ARM_CPU_CAPABILITIES_H */
385 #endif /* PRIVATE */
386